MCP server for rftools.io — 213 RF & electronics calculators for AI agents via the MCP
Rftools MCP MCP server is a locally run integration for AI assistants that speak the Model Context Protocol. MCP server for rftools.io — 213 RF & electronics calculators for AI agents via the MCP.
Give Claude, Cursor, or any MCP-compatible AI assistant access to validated engineering calculators and heavy server-side simulations. Microstrip impedance, link budgets, filter design, converter sizing, antenna patterns, and 200+ more calculators — plus NEC2 antenna simulation, FDTD, Monte Carlo, SMPS analysis, EMI estimation, and more, all callable as MCP tools.
Installation goes through your MCP client rather than a global install: point it at rftools-mcp on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
Once Rftools MCP is connected, these are the calls the assistant has available:
Cursor — The Cursor tool exposed by this serverWindsurf — The Windsurf tool exposed by this serverlist_calculators — List available calculators, optionally filtered by categoryget_calculator_info — Get detailed info about a calculator — inputs with units/defaults, outputs, and the formula usedrun_calculation — Run a calculator with specific inputs. Returns results with units and a link to the interactive version on rftools.io. Runs locally — instant, nolist_simulation_tools — List all 13 available simulation tools with their jobType identifiers and parameter referencerun_simulation — Submit a simulation job and wait for the result. Returns the full result JSON along with a link to the interactive results page on rftools.ioYou will need one environment variable: RFTOOLS_API_KEY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
This sits in the developer tooling group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. Rftools MCP's toolset — Cursor, Windsurf, list_calculators and 4 more — is a fair guide to whether it matches your workflow. It is maintained by antonpogrebenko-public; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Rftools MCP's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
| Tool | What it does |
|---|---|
| Cursor | The Cursor tool exposed by this server. |
| Windsurf | The Windsurf tool exposed by this server. |
| list_calculators | List available calculators, optionally filtered by category. |
| get_calculator_info | Get detailed info about a calculator — inputs with units/defaults, outputs, and the formula used. |
| run_calculation | Run a calculator with specific inputs. Returns results with units and a link to the interactive version on rftools.io. Runs locally — instant, no quota consumed. |
| list_simulation_tools | List all 13 available simulation tools with their jobType identifiers and parameter reference. |
| run_simulation | Submit a simulation job and wait for the result. Returns the full result JSON along with a link to the interactive results page on rftools.io. |
{
"mcpServers": {
"rftools": {
"command": "npx",
"args": ["-y", "rftools-mcp"],
"env": {
"RFTOOLS_API_KEY": "rfc_your_key_here"
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| RFTOOLS_API_KEY | Credential the server authenticates with. | Yes |
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